Aristotle was the first philosopher to inquire into subjective happiness, and he understood its essence better and more clearly than anyone since. According to Aristotle, happiness is not about well-being, but instead a lasting state of contentment, which should be the ultimate goal of human life. We become happy through finding a purpose, realizing our potential, and modifying our behavior to become the best version of ourselves. With these objectives in mind, Aristotle developed a humane program for becoming a happy person, which has stood the test of time, comprising much of what today we associate with the good life: meaning, creativity, and positivity. Most importantly, Aristotle understood happiness as available to the vast majority us, but only, crucially, if we decide to apply ourselves to its creation -- and he led by example.